using System;class AreaPerimeterCircle{	static void Main()	{		Console.WriteLine("Radius:");		double r = double.Parse(Console.ReadLine());		double perimeter = 2 * Math.PI * r;		double area = Math.PI * r * r; //Precision 2 = {0:F2}		Console.WriteLine("Perimeter of cyrcle: {0:F2} \n Area: {1:F2}", perimeter, area);			}}